JPS5851155A - Device for washing roller carrying ink for roller type ink device for printer - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention is a device for cleaning a roller conveying ink in a roller type inking device for a printing press, which comprises a distribution pipe arranged along the roller and having a plurality of outflow openings. and in which a predetermined amount of cleaning liquid is applied to the roller to be cleaned via this distribution pipe.

A cleaning device of the type described above is known from German Patent Application No. 2504572.

The rollers that transport the ink in roller inking units need to be cleaned from time to time, especially when the machine is not being operated, for example on weekends, since the ink can dry on the rollers. The cleaning of this roller is usually carried out by means of a cleaning device specially arranged for this purpose, in which the cleaning medium is removed from the roller by means of the corresponding ink-guiding roller body, and then a scraping member is placed in the appropriate position. scraped by.

An important point in this cleaning device is that 1-1 no more cleaning medium drips 17 onto the roller after the supply of the cleaning medium is interrupted. Since the cleaning body d is most often applied with a nozzle, even very small amounts of cleaning medium can fall in the form of drops onto the relevant ink guide roller. However, even a single drop of cleaning medium can have a significant negative effect on the print result. Furthermore, it is even more disadvantageous if the cleaning liquid is squirted onto the rollers under pressure.

In the atomizing device known from U.S. Pat. No. 3,508,711, the fluid is atomized by a nozzle.

□ In order to prevent after-dripping from this nozzle, it is equipped with a valve which should close the nozzle outlet after the end of the spraying process. Closing this nozzle should prevent after-drip in the device in question.

However, even in this device, residual fluid may collect at the nozzle edge and drip, and it has been found that this device is not suitable for reliably preventing back-down.

A further device for preventing dripping is known from DE 25 04 572 A1. In this device, after-drip is prevented by sucking the remaining fluid out of the nozzle after the end of spraying. The necessary negative pressure in this reservoir is provided by a piston pump, which is also used to convey fluid to the nozzle.

However, this type of construction is extremely expensive and requires a certain amount of space. This inexpensive construction makes the device more expensive and therefore problematic to be considered as a standard printing modality.

SUMMARY OF THE INVENTION It is therefore an object of the invention to provide an apparatus with which a predetermined amount of cleaning medium can be applied onto an inking roller, in particular in such a way that subsequent dripping after an interruption in the supply of cleaning medium can be prevented. .

According to the invention, the above problem is solved in that the outflow opening is part of at least one siphon and one vent pipe.The advantages of the invention include that it is inexpensive and easy to manufacture. Moreover, it requires less space and can therefore be easily mounted on a machine.

By virtue of the advantageous design of the combination of the outflow opening and the siphon according to the invention, back dripping can be reliably prevented, since the siphon sucks up the cleaning medium in a groove that reaches a low residual volume in the reservoir.

Any remaining amount of cleaning medium adhering to the wall of the outlet opening is removed with it by the air flowing into the outlet chamber when the siphon performs its suction action.

The invention will now be explained with reference to the illustrated embodiment.

The device shown is designed as a distribution pipe 1 which extends over a predetermined area of the inking roller. This distribution pipe 1 is divided into an inlet chamber 3 and an outlet chamber 4 by a web 2, which reaches just before the bottom 12 of the inlet chamber 3. The outflow chamber 4 has a liquid reservoir 5 into which a siphon 6 opens. This web 2 allows the cleaning medium to reach the outlet chamber 4 without being subject to strong kneading effects. This has the advantage that no fluctuations in the liquid level are caused by the inflowing cleaning medium. The siphon 6 is guided through an outflow opening 8 of the outflow chamber 4, which also acts as a vent pipe, and terminates with an outflow lower which is below the level 10 of the sump 5.

Next, the mode of operation of the present invention will be explained.

A predetermined amount of cleaning medium is conveyed through the supply opening 13 into the inlet chamber 3 , which further passes under the web 2 into the outlet chamber 4 . Then, the liquid level of the cleaning medium is in the outflow chamber 4.
It rises within the interior and is discharged from the outflow opening 8. At the same time, the cleaning medium also rises within the siphon 6 and displaces the air within the siphon 6, so that the entire siphon 6 is filled with the cleaning medium. If the cleaning medium supply is thus interrupted,
Without the siphon 6, the cleaning medium level would remain at the position shown in FIG. However, since the siphon 6 is completely filled with cleaning liquid, the cleaning liquid is sucked out 1 leaving only a small amount of water in the reservoir 5. The air flowing into the outflow opening 8 may also remove any remaining cleaning liquid as the case may be. This reliably prevents dripping of cleaning liquid from remaining behind.

In a further embodiment of the invention shown in FIGS. 4 and 5, a siphon 6 and a ventilation pipe 14 are arranged in the distribution pipe 1. In this case, the siphon 6 is formed into a U-shape, and the siphon 6 is arranged in such a way that the end with the lower flow rate opens below the distribution pipe 1 and the other end reaches just before the bottom of the distribution pipe 1. It is attached to 1. What should be noted at this time is that the highest point of this U-shaped siphon 6 is located below the highest point of the distribution pipe 1. At the highest point of the distribution pipe 1 there is arranged a ventilation pipe 4 which is also bent into a U-shape and oriented in the same direction as the siphon 6. Depending on the amount of cleaning medium flowing into the distribution pipe 1, this vent pipe 14 acts as an over-flow pipe, thereby removing the excessive pressure build-up of the cleaning medium and interrupting the cleaning medium supply. Later, distribution pipe l became siphon 6
The vent pipe 14 acts as a vent pipe for the distribution pipe 1 when it is sucked out.

[Brief explanation of the drawing]

The drawings show embodiments of the present invention. Figure 1 shows the device when applying the cleaning liquid, and Figure 2 shows the device when the level of the cleaning medium has reached the level at which suction by the siphon should begin. 3 is a diagram showing the device when the cleaning medium liquid level reaches the lowest position, FIG. 4 is a diagram showing another embodiment of the present invention, and FIG. 5 is a diagram showing the device when the cleaning medium liquid level reaches the lowest position. FIG. 1 is a sectional view of the figure. 1... Distribution pipe, 2... Web, 3... Inflow chamber, 4
...Outflow chamber, 5...Liquid reservoir, 6...Siphon, 7,8
...Outflow opening, 9.Roller, 10..Liquid reservoir rail, 1
2...bottom, 13...supply opening, 14.m trachea sub-agent patent attorney Toshio Yano's engraving of drawings (contents unchanged) JP-A-58-51155 (4,) '/7 Procedural amendment (formality) November 2, 1980 Director General of the Patent Office 1, Indication of case Patent Commissioner No. 125947 of 1981 2
, Name of the invention Device for cleaning the rollers that convey ink of a roller-type inking device for a printing press 3, Relationship with the person making the amendment Case Name of patent applicant Title M.A.P. Akchengesellschaft 4, Sub-agent name (6181) Patent attorney Toshio Yano 5,
Date of amendment order: October 26, 1980 (Delivery date) 6. Drawing subject to amendment 7. Contents of amendment As shown in the attached sheet, but engraving of the drawing (no change in content) 311-

Claims (1)

[Claims] 1. A device for cleaning a roller that conveys ink in a roller-type inking device for a printing press, the device having a distribution pipe arranged along the roller and having a plurality of outflow openings. , through which a predetermined amount of cleaning liquid is applied towards the roller to be cleaned, the outflow opening being part of at least one siphon and one vent pipe. This is a device that cleans the rollers that transport ink in roller-type inking devices for printing presses. 2. The distribution pipe (1) connects to the inflow chamber (3) by means of the web (2).
and an outflow chamber (4).
A siphon (6) opens into a saliva reservoir (5) provided in the chamber, and the outflow opening (7) of the siphon (6) opens into the outflow chamber (4).
) along with the outflow opening (8) of the ink conveying roller (
9) and the outflow opening (7) of the siphon (6) is open at a position below the sump level (10). Device. 3. Device according to claim 1, characterized in that the outflow opening (8) of the outflow chamber (4) has a rectangular cross section and terminates at a position above the sump level (10°).